Now you can /login crazy-tronners.com with your portal user/pass on servers that supports authentication. If you are always logged in the portal, you have to log out and log in so the valid hash is created. You may be able to login with /login ct in future.

get new arma build, it will solve your renaming problem
set your globalID to Big_D@crazy-tronners.com in player 1 settings. then choose authenticate in your ingame menu. after a while you'll get another menu, fill all fields and press enter (not esc). you're gonna be logged in in seconds.
here's the latest windows build made by Z-Man on 2008-03-08.